Annotation of gcc/tm-i386gas.h, revision 1.1

1.1     ! root        1: /* Definitions for Intel 386 running system V with gnu tools
        !             2:    Copyright (C) 1988 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU CC.
        !             5: 
        !             6: GNU CC is distributed in the hope that it will be useful,
        !             7: but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: accepts responsibility to anyone for the consequences of using it
        !             9: or for whether it serves any particular purpose or works at all,
        !            10: unless he says so in writing.  Refer to the GNU CC General Public
        !            11: License for full details.
        !            12: 
        !            13: Everyone is granted permission to copy, modify and redistribute
        !            14: GNU CC, but only under the conditions described in the
        !            15: GNU CC General Public License.   A copy of this license is
        !            16: supposed to have been given to you along with GNU CC so you
        !            17: can know your rights and responsibilities.  It should be in a
        !            18: file named COPYING.  Among other things, the copyright notice
        !            19: and this notice must be preserved on all copies.  */
        !            20: 
        !            21: 
        !            22: #include "tm-i386.h"
        !            23: /* Use the bsd assembler syntax.  */
        !            24: /* we need to do this because gas is really a bsd style assembler,
        !            25:  * and so doesn't work well this these att-isms:
        !            26:  *
        !            27:  *  ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
        !            28:  *  ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
        !            29:  *   used to define bss static space
        !            30:  *  ASM_OUTPUT_ALIGN's arg is N instead of log(N) for att
        !            31:  *
        !            32:  * Next is the question of whether to uses underscores.  RMS didn't
        !            33:  * like this idea at first, but since it is now obvious that we
        !            34:  * need this separate tm file for use with gas, at least to get
        !            35:  * dbx debugging info, I think we should also switch to underscores.
        !            36:  * We can keep tm-i386v for real att style output, and the few
        !            37:  * people who want both form will have to compile twice.
        !            38:  */
        !            39: 
        !            40: #include "tm-bsd386.h"
        !            41: 
        !            42: /* these come from tm-bsd386.h, but are specific to sequent */
        !            43: #undef DBX_NO_XREFS
        !            44: #undef DBX_CONTIN_LENGTH
        !            45: 
        !            46: /* By default, target has a 80387.  */
        !            47: 
        !            48: #define TARGET_DEFAULT 1
        !            49: 
        !            50: /* Specify predefined symbols in preprocessor.  */
        !            51: 
        !            52: #define CPP_PREDEFINES "-Dunix -Di386"
        !            53: 
        !            54: /* Allow #ident and #sccs in preprocessor.  */
        !            55: 
        !            56: #define IDENT_DIRECTIVE
        !            57: #define SCCS_DIRECTIVE
        !            58: 
        !            59: /* We do not want to output SDB debugging information.  */
        !            60: 
        !            61: #undef SDB_DEBUGGING_INFO
        !            62: 
        !            63: /* We want to output DBX debugging information.  */
        !            64: 
        !            65: #define DBX_DEBUGGING_INFO
        !            66: 
        !            67: /* Implicit library calls should use memcpy, not bcopy, etc.  */
        !            68: 
        !            69: #define TARGET_MEM_FUNCTIONS
        !            70: 
        !            71: 
        !            72: /* Machines that use the AT&T assembler syntax
        !            73:    also return floating point values in an FP register.  */
        !            74: /* Define how to find the value returned by a function.
        !            75:    VALTYPE is the data type of the value (as a tree).
        !            76:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !            77:    otherwise, FUNC is 0.  */
        !            78: 
        !            79: #define VALUE_REGNO(MODE) \
        !            80:   (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
        !            81: 
        !            82: /* 1 if N is a possible register number for a function value. */
        !            83: 
        !            84: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
        !            85: 
        !            86: #undef ASM_FILE_START
        !            87: #define ASM_FILE_START(FILE) \
        !            88:   fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);

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